Island



(No Model.)

' G. H. CORLISS, Decl.

E. A. CORLISS, Administratrix. MAUHINE FOR FINISHING THE ENDS 0F VALVEBOXES 0F STEAM ENGINE CYLINDERS.

N0. 450,400. Pate nted Apr. 14,1891.

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[raven/i021 UNITED STATES PATENT OFFICE;

EMILY A. OORLISS, OF PROVIDENCE, RHODE ISLAND, ADMINISTRATRIX OF GEORGEH. OORLISS, DECEASED.

MACHINE FOR FINISHING THE ENDS OF' VALVE-BOXES OF STEAM-ENGINECYLINDERS.

SPECIFICATION forming part of Letters Patent No. 450,400, dated April14, 1891.

Application filed DecemberlQ, 1889. Renewed November 6, 1890. Serial No.370,451. (No model.)

To all whom it may concern.-

Be it known that GEORGE H. OORLISS, deceased, late a citizen of theUnited States, resident in the city and county of Providence, in theState of Rhode Island, (represented by EMILY A. CORLISS, administratrix)invented a new and useful Machine for Finishing the Ends of Valve-Boxesof Steam-Engine Cylinders, of which the following is a specification.

Prior to his invention, hereinafter described, Mr. OoRLIss had, infinishing the ends of the valve-boxes of the cylinders of steam-enginesto receive the bonnet-s, faced the Valve-box ends by planing them uponthe ordinary planingmachine, and had then moved the cylinder to thedrilling-machine and drilled the bolt-holes, which were subsequentlytapped by hand in the ordinary Way. He had not counterbored thevalve-boxes, but had finished the end faces so as to make a steam-tightjoint with the bonnet, which he fitted and bolted thereon. He found thatin such method of finishing the ends of the valve-boxes inaccuracieswere liable to occur;

that it was desirable that the several valveboxes be bored equidistantfrom the center of the wrist-lever support or hearing in order to securean accurate relative movement of the Valves, and, further, that each ofthe valve-boxes be bored perfectly parallel with each of the others andat right angles to the center line of the cylinder.

The purpose of his present invention is to provide a machine which willfinish the ends of the several valve-boxes at a single setting andadjustment of the cylinder, and thereby avoid the inaccuracies liable tooccur from the frequent settings and adjustments of the cylinderrequisite in the prior method of treating the valve-box ends, and whichwill also counterbore all the valve-boxes equidistant from the center ofthe wrist-lever support and exactly parallel with each other and atright angles to the center line of the cylinder, thereby affording meansfor centering the bonnet's of the valve-boxes, and also for accuratelyboring the valve-boxes on another machine invented by him, for whichapplication of even date herewith for Letters Patent, Serial No.334,507, has been made. He has therefore combined in a single machinemeans for centering the cylinder with absolute correctness, means forfacing, counterboring, drilling, and tapping simultaneously both ends ofa valve-box by tools arranged toact alternately, and each driven by itsappropriate operating mechanism, provision for rotating the cylinder onits centering-pivots, so as to bring the'valve boxes successively beforethe finishing-tools, and other means for holding the cylinder stationaryduring the performance of the several operations necessary in thefinishing of the ends of a valvebox.

Provision is made for the lateral and also for the endwise movement ofthe centering means, and also for the endwise movement of those parts ofthe machine carrying the finishing-tools to accommodate cylinders ofdifferent sizes, and for the endwise feed of the countcrboring-tools.Other provision is made for the radial feed of the facing-tools, andstill other provision for operating the drills and tapping-tools.

The centering means consist of two jigs or trunnions arranged in linewith each other and adapted to engage with suitable bushing thecounterbores previously made in two oppositely-located side flanges inthe cylinder. The cylinder is thus held on an axis at right angles toits center line or longitudinal axis, and it is rotated or tilted onthis shorter axis to bring the valve-boxes successively in line with thefinishing tools. Heads mounted upon axes parallel with the axes of thejigs just described carry the facing, counterboring, drilling, andtapping tools. An upright post or standard located midway of the maofsame, showing a cylinder heldttherein, a portion of the cylinder beingbroken away and the supports for the end of cylinder not yet inposition. Fig. 3 is a sectional elevation on line 00 0c of Fig. 2.

Similar letters of reference indicate like parts where they occur in thedrawings.

A A A represent the stationary bed of the machine.

A A are housings gibbed upon the bed and movable laterally thereon bymeans of feed-screws b, actuated by hand-wheels b. Jigs or trunnions B Bare mounted and have their bearings in the housings A A and are movableendwise by feed-screws b actuated by hand-wheels b Housings A A alsogibbed upon the bed and movable longitudinally thereon at will by meansof the feedscrews 0' and hand-wheels c, or automatically by powerappliedto said feed-screwsc' through bevel-gears connecting with an uprightdriving-shaft F, have journaled in each of them a hollow shaftC',carrying a head G, equipped with tools for facing, counterboring,drilling, and tapping the ends of the valve-boxes, all arranged foralternate operation, and each provided with appropriate operatingmechanism, all of which are more fully described in another applicationfor Letters Patent filed December 18, 1889, No. 334,157, of even dateherewith.

D represents a rest vertically adjustable upon the post or standard D,gibbed upon the bed A and serving to support one end of the cylinder atthe proper height during the operation of finishing the ends of avalvebox. The post D is located mid-way of the machine and movable uponthe bed of the machine by means of the feed-screw cl and hand-wheel (Zin a line at right angles to the axial lines of the heads and jigs G Gand B B. There are two heads 0, arranged with their axes in the sameline and each arranged for longitudinal movement with their connectionsalong the bed of the machine at will by hand and also automatically bypower. There are two jigs B, likewise arranged in line with each otherand also with their axial line parallel with the axial line of theheads. These jigs are each provided with means for moving them endwise,and also with their connections are provided with means for moving themlaterally toward or from the heads in lines parallel thereto.

I will now describe the practical operation of this invention. Thecylinder side flanges having been upon another machine, also invented bythe said GEORGE H. CORLIss and the subject of another applicationfol-Letters Patent filed December 18, 1889, Serial No. 334,158,counterbored at exact right angles to the center line of the cylinder,is now brought to this machine herein described, and the trunnions orjigs B B having been properly adjusted relatively to each other and tothe heads C C, and the rest D having also been adjusted relatively tothe heads and jigs and all to accommodate theparticular sized cylinderabout to be treated, said cylinder is mounted in the machine with thejigs B B engaging the two opposite counterbored side flanges and withone end of the cylinder secured to the vertically-adjustable rest D,which is held atthe proper height to bring both ends of one of thevalve-boxes in the proper position between the heads 0 O.

The heads are then by their respective adjusting means movedlongitudinally to bring the finishing-tools in the proper positions tooperate upon the valve-box ends. Said finishing-tools are then by theirrespective operating mechanisms operated successively and face,counterbore, drill, and tap the valve box ends, both ends of thevalve-box being operated upon simultaneously. When the ends of onevalve-box have been finished, the cylinder is partially rotated upon thejigs B B as pivotal axes (the cylinder having been released from therest D) to bring the ends of another valve-box into the proper positionbetween the heads. 0 0, when the end of the cylinder issecured to therest D, held at the proper height, and both ends of this valve-box arefinished. This isrepeated until the ends of all four valve boxes havebeen faced, counterbored, drilled, and tapped, and the cylinder, in sofar as the operations upon the ends of the valve-boxes are concerned, isfinished ready for use. The wrist lever support is mounted and centeredupon one of the side fiangesengaged by the jigs B, and since in thismachine the pivotal axis of the cylinder is at exact right angles to thecenter line of the cylinder, and as a uniform distance is maintainedbetween such pivotal axis and the axes of the heads 0 C, it is obviousthat the several valve-boxes will be counterbored equidistant from thecenter of the-wrist-lever support, and at exact right angles to thecenter line of the cylinder and parallel with each other, and,furthermore, that since the pivotal axis of the cylinder and the axes ofthe heads 0 C are parallel with each other and at right angles to thecenter line of the cylinder the ends of all the valve-boxes will befaced parallel to said center line.

1 claim as the invention of said GEORGE H. CORLIss and desire to secureby these Letters Patent- 1. A machine for finishing the ends ofvalveboxes of steam-engine cylinders and for analogous purposes,consisting of the following elements in combination: first, jigsarranged with their axes in the same line and each capable of bothendwise and lateral movement at will for purposes of adjustment, and byengaging the counterbore in two opposite side flanges of the cylinderadapted to serve together as a pivotal axis at right angles to thecenter line of the cylinder; second, two heads arranged with their axesinthe same line and parallel to the axial line of the jigs, eachequipped with tools for facing, counterboring, drilling, and tapping,and with means for operating each tool successively, and each headcapable of longitudinal movement at IIO will, and automatically, forpurposes of adj ustment and for feeding endwise such of the tools asrequire it, and also With provision for automatic radial feed of thefacing-tool; third, a vertically-adjustable rest also adjustablerelatively to the axial lines of the heads and jigs, and in a line atright angles thereto, and serving as a support to hold one end of thecylinder at the proper height, as described. 2. In a machine forfinishing the ends of valve-boxes of steam-engine cylinders and foranalogous purposes, the jigs B B, housings A A, and bed A, combined witheach other, and with means, as the hand-Wheel b b and traversing screwsb b, for moving the housings and jigs laterally upon said bed forpurposes of adjustment, and with means, as head 0 and tools operatedtherein, for treating the lateral faces of the casting held by saidjigs, all substantially as herein specified. 3. In a machine forfinishing the ends of valve-boxes of steam-engine cylinders and foranalogous purposes, a jig B and housing A, combined with each other andwith means, as

the hand-Wheel b and feed-screw b, for mov- 25 ing the housings and jigslaterally, and with means, as the hand-wheel b and threaded shaft b forsecuring endwise movement of the jig in the housing, so as to attainadjustment in both directions, and Withtools operated by 30 r the heads0 O for treating the faces of a castingheld thereby, all substantiallyas herein specified.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing 5 witnesses.

